What would it be like? A penis cannot be also a vagina!
Would it be like two penises? How would that fit? The connectors need to make contact!
There is one way: both connectors should be shaped like rubber penises, and instead of a female counterpart, either penis can be bent to fit around the other one. The male connectors would be on the outside and the female connectors on the inside of the dicks. This way, gender can be chosen each time a connection is made, meaning that the gender is not predetermined.